Apparatus for operating a relooping needle



April 26, 1938. y B. H. GOSTKOWSKI 2,115,101

APPARATUS FOR OPERATING A RELQQPING NEEDLE Filed Nov. 7, 1936 Lo V 22 I 743/P 23 4 77 v i 2- 29 7.9

28 30 I v l g 27 a z I 'l 24 7 I I INVENTOR- BEDRI H USSEI N GOSTKOWSKI ATf'ORNEA J Patented Apr. 26, 1938 UNITED STATES PATENT OFFICE Bcdri Hussein Gostkowski, Geneva, Switzerland, assignor to Societe Vitos, .Troyes, France Application November 'I 1936, Serial No. 109,657 In Switzerland November 8, 1935 4 Claims.

This invention relates to an apparatus for operating a relooping needle by means of a motor, of .a crank communicating a reciprocating movement to a flexible wire sliding in a-tube and by means of a clutch connecting the crank to the motor practically only when said motor receives energy.

The apparatus according to the invention comprises in particular an elastic member acting on i the crank and so disposed that the crank when out of gear is always immediately brought back to its dead centre, opposite the end of the tube on the crank side.

The accompanying drawing shows an embodiment of the apparatus according to the invention,

given by way of example. I

Fig. 1 is an elevation of the apparatus. Fig. 2 is a partial end view of same and Fig. 3 shows in diagram the electrical connections of same.

The apparatus shown consists of a base I carry: ing a bed 2 adapted to rotate in said base around the vertical pivot 3. In the bed is located an electric motor 4 intended to drive a crank 5 carried by a disk 6, the transmission of the movement being efiected by means of a band 1 connecting the pulley 8 of the motor to the pulley 9 of the shaft I0. Said shaft rotates in a bearing ll integral with the bed 2. Said'shaft carries 30 one of the parts 12 of a. clutch l2, l3, the other part f which is carried by the bearing l4 and carries in its turn the disk 6 and the crank 5.

The axial displacement necessary. for operating the. clutch I2, I3 is obtained by means of a ring l5 operated by the fork l6 of a lever ll pivoted at l8. Said lever isactuated by the armature IQ of an electro-magnet 20, likewise carried by' the bed 2.

To the crank 5 is connected a connecting rod 40 2| acting on a rod 22 guided at 23 and penetrating into a sleeve 24, in which said rod 22 is connected to a flexible wire sliding in a tube 25. A portion of said flexible wire, designated by 26 is visible in Fig. 2.

tion, said holder lies in a sleeve 28 integral with the bed 2 and in particular intended to protect the needle contained by said holder. The holder itself can, for example be of the type described in the patent application 109,656 simultaneously filed and copending herewith, entitled, Needle holder for a relooping needle".

Finally a spring 29 constantly tries to push the 5 armature I! out of the electro-magnet, whereas Flexible wire and tube end in needle holder 21 shown in the rest position in Fig. 1. In said posianother spring 30 surrounding the rod 22 and resting on the sleeve 24 pushes the connecting rod 2|, so as to try to bring the crank constantly back to its dead centre, opposite the end of the tube-25 on the crank side, and this can also be called the 5 rear dead centre of the crank, as in said position the needle in the needle ho1der-2'l occupies its most remote position.

To use the apparatus described, the needle holder 21 is extracted fromth'e sleeve 28, then it 1 is held in the operative position over the fabric to be relooped. As the arm 3| carrying the guide 23 and the'sleeve 24 can rotate with frictional resistance around the axis of the disk 6, between I two immovable washers 32, 33, said arm may be is inclined into the position best .adapted for the work, for example it may be brought into the horizontal position shown in Fig. 2. In said Figure 2, the position'3l' in dot and dash line corresponds to the rest position, that is to say tothe position shown in Fig. 1. I

Then, the motor 4 and the electro-magnet 20 are energized The motor starts running and the electro-magnet by drawing its armature l9 against the action of the spring 29 causes the connection between the parts l2 and I3 and the immediate rotation of the crank 5, i. e. of the needle which will in the holder effect a reciprocating movement. i

To stop the operation, it is only necessary to cutoff the current. The motor does not stop immediately by virtue of its inertia, but the needle will stop instantaneously, because the electromagnet will instantaneously cease to connect the parts I 2 and I3. Due to the spring 30, the inst'antaneous stoppage of the needle will be effected in its most remote position, as the spring 30 will immediately puslr the crank 5 back to its rear dead centre.

The control of the motor and of the electro- 40 magnet will be efiected preferably from a pedal. connected, on the one hand, to the wire net work and on the other hand to the. apparatus by means of a tripolar conductor 34. Fig. 3 shows an embodiment of the electrical connection to be adopt- 1 ed. The terminals 35 are connected to the wire net work. One of the poles of said wire net work is directly connected to the motor 4 and to the electro-magnet 20. The other poleis connected to. a sliding contact 36 of the pedal, which contains opposite said slidlngcontact a resistance 31 for the motor and a contact 33 for the electromagnet. As will be seen, by displacing the sliding contact in the direction of the arrow 39, the motor and the electro-magnet are energized, but

the further the sliding contact is displaced, the more rapidly the motor runs.

According to the relative positions occupied by the resistance 31 and the contact 38 opposite each other, the motor may be started a. little before the electro-magnet is energized or inversely. The crank 5, as shown, is not fixed on the disk 6. It can rotate on said disk around a centre 40 .and under the influence of a lever II, which the bores 42 permit of immobilizing in different positions. By displacing the lever 4| clock-wise as regards the disk 6 in Fig. 2, the crank is removed from the centre of rotation of the disk. By displacing the lever 4| in the opposite direction, said crank is brought closer to said centre; Said disately upon its being declutched from the motor.

2. In an apparatus for operating a relooping needle, an electric motor, a tube, a flexible wire slidable in said tube, a crank for reciprocating said wire, a clutch for operatively connecting the crank to the motor only when said motor is energized, an. elastic member acting on the crank to move it to its rear dead center immediately upon its being declutched from the motor, and an arm independent of said crank mounted for pivotal movement about the crank shaft, one end of said tube being connected to said arm to participate in the pivoting movement.

3. In an apparatus for operating a relooping needle, an electric motor, a tube, a flexible wire .slidable in said tube, a crank for reciprocating said wire, a clutch for operatively connecting the crank to the motor only when said motor is energized, an elastic member acting on the crank to move it to its rear dead center immediately upon its being declutched from the motor, and an arm independent of said crank mounted for pivotal movement and frictional resistance about the crank shaft, one end of said tube being connected to said arm to participate in the pivoting movement.

4. In an apparatus for operating a relooping needle, an electric motor, a tube, a flexible wire 'slidable in said tube, a crank for reciprocating said wire, a clutch for operatively connectingthe crank to the motor only when said motor is enersized, an elastic member acting on the crank, to

move it to its rear dead center immediately upon its being declutched from the motor, and means for varyin the amplitude of movement of said crank.

BEDRI HUSSEIN GOSTKOWSICL 

